Average Co-Inventor Count = 9.00
ph-index = 1
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Hitachi, Ltd. (1 from 42,485 patents)
2. Hitachi Techno Engineering Co., Ltd. (1 from 41 patents)
1 patent:
1. 6156090 - Air cleaner having vanes with a winglike cross-section between a shroud